31542146 has 8 divisors (see below), whose sum is σ = 47575164. Its totient is φ = 15683760.

The previous prime is 31542113. The next prime is 31542149. The reversal of 31542146 is 64124513.

It can be written as a sum of positive squares in 2 ways, for example, as 28783225 + 2758921 = 5365^2 + 1661^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (31542149) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 43205 + ... + 43928.

Almost surely, 2^31542146 is an apocalyptic number.

31542146 is a deficient number, since it is larger than the sum of its proper divisors (16033018).

31542146 is a wasteful number, since it uses less digits than its factorization.

31542146 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87316.

The product of its digits is 2880, while the sum is 26.

The square root of 31542146 is about 5616.2394891956. The cubic root of 31542146 is about 315.9587685882.

Adding to 31542146 its reverse (64124513), we get a palindrome (95666659).

The spelling of 31542146 in words is "thirty-one million, five hundred forty-two thousand, one hundred forty-six".